Pipe-joint.



PATENTED JULY 17, 1906. Y

R. T. CRANE.

PIPE JOINT.

APPLIUMION FILED AUG. a1. 1904.

gmx. v. D

rwenlbr; f 6419/@ ll'dlard T fwf E a@ unirsi) Speecation of Letters Patent.

mienten any i'aiece.

Application liler August 3l, 1904. flerialllo. 222,842.

To all whom,- t nfl/(ty concern: h l

Be 1t known that l, Brein/inn T. CRANE, a

.citizen of the United States, residing at Chil turned outwardly cago, in the State oi Illinois, have invented certain new and useful Improvements in Pipewloints, of which the following is a specification.

ll/ly invention relates to what are known as flange pipe connections and my primary object is the formation of such pipe connections in such a manner as to preserve so far possible all of the strength ofthe iron of the pipe at the point Where it turns over on the attaching flange.

Heretofore it l been customary to construct flange joints With metal attaching flanges having parallel radial. laces. The flange being fitted over the end of the pipe and the metal ci the end of the pipegbeing in the shape oi' a flange and bearing against the attaching ange along one of its parallel laces. lt can be 'readily understood when the eli-ect of this fon-the metal is considered, that when the 'ends of the pipe are turned over on the flanges in the manner specified, the iron of the pipe be comes very much thinner at its outer edge than it is at the beginning ci the turned portion because of the increased periphery of the turned over part, and the thinning ofthe edge having given the end of the pipe a kind of inclined or rounded face, it is necessary in order to make a sui-table joint to turn oft' the high portion of the pipe on the end so as to make it parallel to the radial face of the flange, and such'turning reduces the thickest part of it to/the thickness of the thinnest portion which, very appreciably reduces the strengthffof the pipe at the joint 'Where the strength is really most essential.

By examination of the accompanying drawing it will be seen that in overcoming the dilliculties referred to l provide the ate taching flanges Cand D which are placed upon the pipe ends A and B With angularly disposed faces indicated at F, the angularity oi such faces With reference tothe radial plane of the pipe being just sufficient to coinpensate for the thinning of the end of the pipe as it is turned outwardly as above eX- plained so that Where the two ends o t the pipesV coinc together When the `joint is. assembled the meeting place itself will be 1n a radial plane and the metal Will not need to be faced on so much and the pipe itself at the point marked. D will retain substantially its full thickness and strength` When the .parts are assembled they are of course .held in place by means of" the attaching bolts E.

.his method of securing pipes together 1s ofcourse not applicable to cast iron pipes, as the edges of such pipes could not be flanged over, but it is applicable only to commercial wrought or malleable pipes of either iron or steel which may be characterized by the generic term el ductile iron.

Having thus described my invention., What l claim new, and desire to secure by Letters Patent, is-

1. In a pipe-joint the combination of a commercial ductile iron pipe having its ends irlared over to approximately a right-angular position and an attaching flange having an j inclined engaging face F to support the pipe, the inclination of said tace being proportional to the thinning of the pipe metal due to the outward turning of the end ci the pipe, and the front iaceoi flare being machined at right angles to the -axis of the pipe substantialljT as described. A

2. A process otniakiug a pipe joint which consists in flaring the end of a ductile ironv pipe, thereby thinning the outer edge of the ilare and leaving the rear side of the iia're 1nclined, providing a flange having an inclined engaging face, the inclination thereof being proportional to the thinning in the flare, machining the iront side oi the ilare and securing such llare and lian ge in contact.

ln testimony whereof I have hereunder signed my name in the presence of the tWo subscribed Witnesses.

RICHARD T. CRANE. Vlitnesses:

PAUL CARPENTER, ALBERT C. HOWARD. 

